i am looking for baltic birch plywood in 1/2"x60"x60" sheets. despite a lot of googling and using woodfinder.com, i have been unable to find a dealer within an hour of augusta GA, or one who is willing to ship whole sheets for less than $150 freight! i did find a dealer about 45 miles away who carries "russian birch" for a reasonable price. is this the same as baltic birch? i would appreciate any help or advice that you can give me. thanks